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Federal Pacific NB221025 Miniature Circuit Breaker
- 25A
- 2 Pole
- Bolt-On
Federal Pacific
NB221025
Miniature Circuit Breaker
Brand
Federal Pacific
SKU
NB221025
Quantity
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Federal Pacific NB221025 - 25A 2 Pole Miniature Circuit Breaker
New
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Federal Pacific NB221025 - 25A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB221025 |
| Series | NB |
| Amperage | 25A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
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Federal Pacific NB221025 - 25A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Federal Pacific |
|---|---|
| Part Number | NB221025-R |
| Series | NB |
| Amperage | 25A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
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Description
Restoring older commercial electrical systems requires precise components like this 25A Federal Pacific miniature breaker. Designed for 120/240V applications, it provides reliable long-time and instantaneous trip functions for standard branch circuits. This bolt-on unit installs into legacy NB and NBLP panelboards without requiring aftermarket adapters. It serves as an exact cross-reference for the UBIF225NB substitute. Featuring a 10kAIC rating, it includes load side lugs for quick wiring.Specifications
| Brand | Federal Pacific |
|---|---|
| Part Number | NB221025 |
| Series | NB |
| Amperage | 25A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | NB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Federal Pacific NB Panelboards, NBLP Panelboards |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Common Trip |
Product FAQs
7 answersWhich panelboards accept the NB221025 circuit breaker?
This breaker is designed specifically for legacy Federal Pacific NB and NBLP panelboards. It features a bolt-on design and will not fit in FPE residential plug-on load centers.
Is there an active aftermarket replacement for the NB221025?
Yes, the UBIF225NB serves as an exact cross-reference substitute for this legacy Federal Pacific breaker.
What wire sizes are compatible with the load lugs on this breaker?
The included load side lugs accept wire gauges ranging from 14 AWG minimum to 2 AWG maximum.
How does the trip mechanism function on the NB221025?
It utilizes a thermal-magnetic trip unit with fixed long-time and instantaneous (LI) functions. The thermal element responds to prolonged overloads, while the magnetic element trips immediately during short circuits.
Does this breaker require any aftermarket adapters for installation?
No, this unit bolts directly into legacy NB and NBLP panelboards without the need for any mounting adapters or modification kits.
What is the advantage of the bolt-on connection for this NB frame breaker?
Bolt-on connections provide a secure, vibration-resistant mechanical attachment to the panelboard bus. This prevents the breaker from being accidentally dislodged and minimizes the risk of arcing at the busbar contact point.
Is the 10kAIC rating sufficient for commercial applications?
A 10kA interrupting capacity is typical for standard branch circuits in older commercial NB panelboards. Electricians must verify that the available fault current at the panel does not exceed 10,000 amps before installation.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 18 reviews.
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Rating
18 reviews
- MMMike M.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/2/26100amp federal pacific breaker
So far the breaker works as expected
Just good to know some of these old federal are still available.
Thank you
- SGscott g.Verified BuyerReviewingFederal Pacific NB111020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/26/26Hard to find breakers
Had a project at a school built in the 1960’s and thought we were up a creek when confronted with ancient FPE commercial panels. Luckily we found what we needed with Suoerbreakers.
- BFBarry F.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/13/26Hard to find circuit breaker
Item was as described.
- WWWilliam W.Verified BuyerReviewingFederal Pacific NB100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/9/26Exactly what I needed.
Awesome! Packaging and delivery were good. Bolted in and worked perfectly!!)
- GHGary H.Verified BuyerReviewingFederal Pacific NB125 - 125A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/26Federal Pacific NB125 2 Pole Circuit Breaker
Federal Pacific NB125 2 Pole Circuit Breaker
Great product and excellent price and warranty.